JP2999512B2 - How to insert a waterproof rubber stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a waterproof rubber plug in a waterproof type connection terminal in which a connection terminal is attached to a terminal of a covered electric wire via a waterproof rubber plug. Regarding the insertion method.

(Prior Art) In this type of waterproof connection terminal, as shown in FIG. 2, a male connection terminal 13 such as a tab contact is attached via a waterproof rubber plug 12 inserted into the end of a covered electric wire 11. The other waterproof connection terminal connected thereto is a similar wire assembly to which a female connection terminal such as a receptacle contact is attached, though not shown.

The other waterproof connection terminal is fitted with a trumpet-shaped flexible tube material 14 whose base end is fitted into a waterproof rubber plug in a press-fit state and covers the periphery of the female connection terminal. When the connection terminal 13 and the female connection terminal are fitted and connected, the distal end side of the flexible tube 14 is fitted into the waterproof rubber plug 12 in a press-fit state, and the flexible tube 14 drops water on the internal connection portion. It seals to prevent intrusion.

In the case of performing the above-described wire assembly, as shown in FIG. 3, the electric wire 11 in which the insulating coating 11b of the terminal is stripped to expose the stranded wire which is the core wire 11a, and a plurality of sealing A waterproof rubber stopper 12 having an annular flange 12b protruding therefrom, a fitting connection piece 13a of a connection terminal 13 and a core wire holding piece 13b.
And the material pieces 15a, 15b, 1 constituting the covering holding piece 13c, respectively.
A terminal material 15 is prepared by punching a conductive metal plate into a shape developed from 5c.

The electric wire 11 is inserted into the through hole 12c from the rear end side of the waterproof rubber plug 12, and is adjacent to the core wire 11a in a state where the core wire 11a is protruded toward the front end side of the cylindrical body 12a as shown in FIG. Insulation coating 11b
A waterproof rubber plug 12 is fitted and attached to the outer periphery of. Thereafter, the terminal material 15 is pressure-formed by a terminal crimping machine (not shown), and the material piece 15 is formed.
a is formed on the mating connection piece 13a, and the core wire holding piece 13b in which the material piece 15b presses the core wire 11a in
Are processed so as to constitute the coating holding pieces 13c for press-fitting the insulating coating 11b in a conjugate manner.

The above-described series of operations are sequentially performed in a continuous state by an automatic wire terminal processing apparatus.

As described above, several methods are conventionally used to insert the waterproof rubber plug 12 into the electric wire 11.

First, the method shown in FIG.
And the electric wire 11 exposing the core wire 11a is inserted into the through hole 12c of the waterproof rubber plug 12 as it is.

In addition, the method shown in FIG.
Without stripping the wire 11 through the waterproof rubber stopper 12
12c and then strip the terminal coating 11b.

Although the above two methods are the most common methods, the insulating coating 11b of the electric wire 11 is inserted into the through hole 12c of the waterproof rubber stopper 12 in a tightly fitted state in order to enhance the waterproof effect. Has no play size and causes the following problems.

In the former case, the wire 11 is bent at the time of insertion, making insertion difficult, or a part of the core wire 11a is deformed by piercing the inner wall surface of the through hole 12c, and is crimped and crimped of the connection terminal after insertion. Problems such as difficulty in operation occur.

Also, in the latter case, the wire 11 is bent at the time of insertion as in the former case, making insertion difficult, or a stripping machine separate from the terminal crimping machine in order to strip the terminal coating after the insertion. There is a problem that it is necessary to secure a large place for installation and processing.

Further, in order to prevent the bending of the electric wire 11 and the piercing deformation and loosening of the core wire 11a, a method shown in FIG. 6 is also employed.

In this method, the through hole 1c is inserted into the through hole 12c of the waterproof rubber stopper 12.
A guide tube 16 inserted with the diameter of 2c expanded and a concentrator ring 17 disposed in front of the guide tube 16 are used.

This concentrator ring 17 is configured by uniting each ring piece of the same shape and semicircular shape which is divided into upper and lower parts so that it can be divided and removed, and the inner peripheral surface thereof is gradually reduced in diameter and the core wire 11a is transferred to the guide cylinder 16. A tapered guide hole 17a for guiding is formed.

At the time of insertion, the electric wire 11 in which the insulating coating 11b of the terminal is stripped and the core wire 11a is exposed is inserted into the guide hole 17a of the concentrator ring 17, and the core wire 11a extends along the guide hole 17a.
The wire 11 can be inserted into the guide tube 16 while being guided. After being inserted, the guide cylinder 16 is pulled backward from the inside of the through hole 12c of the waterproof rubber plug 12, and the concentrator ring 17 is disassembled and removed, thereby waterproofing the electric wire 11 as shown in FIG. A rubber stopper 12 can be attached.

(Problems to be Solved by the Invention) In the method of FIG. 6 described above, the wire 11 is bent at the time of insertion, which makes insertion difficult, or a part of the core wire 11a has a through hole 12c.
The problem of the method of FIG. 5 which pierces and deforms the inner wall surface of the wire is solved, and there is no problem if the core wires 11a are tightly bound as shown in FIG. 6 (A). When the core wire 11a is unfolded as shown in FIG. 3B, the following problem occurs.

That is, the angle at which the distal end of the core wire 11a comes into contact with the tapered guide hole 17a becomes acute due to the degree of unraveling of the core wire 11a, and the guide hole 17a to be slid and guided originally spreads the core wire 11a further. It will be unraveled.

Therefore, an object of the present invention is to provide a method of inserting a waterproof rubber plug that can solve such a problem.

[Configuration of the invention]

Means for Solving the Problems The gist of the present invention is to provide a method of inserting a waterproof rubber plug into a terminal of a covered electric wire in which a core wire is exposed by stripping a terminal of an insulating coating. And the insulating coating is inserted into the delivery pipe, and the delivery pipe is inserted into the waterproof rubber stopper together with the insulating coating to abut the tip of the delivery pipe. A waterproof rubber plug is inserted into the terminal of the insulation coating by inserting the guide pin into the waterproof rubber stopper while pushing out the guide pin, and then pulling out the delivery pipe from the waterproof rubber stopper. .

(Example) Hereinafter, a method for inserting a waterproof rubber plug according to the present invention will be described in detail based on an example shown in Fig. 1.

In this method, a waterproof rubber stopper 2, a guide pin 3, a clamper 4, and a delivery pipe 5 are used.

The waterproof rubber plug 2 has the same shape as the conventional waterproof rubber plug 12 described above, and has a through hole through which the terminal of the covered electric wire 1 is inserted.
A plurality of annular flanges 2b for sealing are protruded from the outer periphery of a cylindrical body 2a having 2c.

The guide pin 3 is a cylindrical body having a frusto-conical tapered portion 3a formed at the tip.

The clamper 4 is constituted by a pair of semi-cylindrical clampers 4A and 4B obtained by vertically dividing a cylinder having a fitting recess formed on the outer peripheral surface into two.

The delivery pipe 5 is a long tubular body in which an insertion tube portion 5a is formed on the front end side and a holding tube portion 5b is formed on the rear end side.

Next, the procedure of the method for inserting the waterproof rubber plug according to the present invention will be described.

First, as shown in FIG.
With the guide pins 3 inserted from the direction 2c, the clampers 4A and 4B are fitted around the outer periphery of the waterproof rubber plug 2 to keep the waterproof rubber plug 2 from deforming.

In addition, the coated electric wire 1 in which the end of the insulating coating 1b is stripped to expose the core wire 1a is inserted into the delivery pipe 5, and the core wire 1a of the coated electric wire 1 is positioned on the front surface of the clamper 4.

Subsequently, as shown in FIG. 1 (B), the delivery pipe 5 is slid in the direction of the arrow, and the distal end of the insertion tube 5a is inserted into the through hole 2c of the waterproof rubber plug 2, and the taper of the guide pin 3 is formed. Department
Move closer to 3a. At this time, the delivery pipe 5 moves forward while correcting the bending of the insulated wire 1 and the loosening of the core wire 1a.

Subsequently, as shown in FIG. 1 (C), the clampers 4A and 4B
Is slid in the direction of the pipe 5 and the pinched waterproof rubber stopper 2 is inserted through the outer periphery of the insertion tube portion 5a of the pipe 5 so that the guide pin 3 in contact with the distal end of the insertion tube portion 5a comes out. Is extruded from the waterproof rubber stopper 2. Thereby, the covered electric wire 1 is inserted to a position where the core wire 1a protrudes from the waterproof rubber plug 2.

Subsequently, as shown in FIG. 1 (D), when the delivery pipe 5 is pulled out in the direction of the arrow, the waterproof rubber plug 2 is inserted into the end of the insulating coating 1b of the coated electric wire 1.

The operation from the above described state of FIG. 1 (D) to the state of FIG. 1 (A) will be briefly described as follows.

In the state shown in FIG. 1 (D), after the clampers 4A and 4B are divided and removed from the outer periphery of the covered electric wire 1, the clampers are moved forward (to the right in the drawing) where the terminal crimping machine is installed. Crimp the connection terminal to the terminal. The insulated wire 1 having the connection terminal attached to the distal end is fed out of the delivery pipe 5 by an unillustrated delivery roller disposed adjacent to the rear end of the insulated wire 1, and measured by a length measuring machine (not shown). While being fed by a predetermined length, the wire is cut by a cutting machine, and by this cutting, the insulating coating of the coated electric wire 1 which is a new tip portion is stripped. Thereafter, the state is returned to the state shown in FIG. 1A, and the operation of inserting a new waterproof rubber plug 2 is started.

〔The invention's effect〕

As described above, according to the method of inserting a waterproof rubber plug into a covered electric wire of the present invention, since the covered electric wire does not bend or pierce the core wire, it can be inserted easily and reliably.

[Brief description of the drawings]

FIG. 1 is a process diagram showing a method of inserting a waterproof rubber plug according to an embodiment of the present invention, FIG. 2 is a perspective view showing an assembled state of a waterproof connection terminal to which the present invention is applied, and FIG. FIG. 4 is a perspective view showing a state, FIG. 4 is a plan view of a covered electric wire into which a waterproof rubber plug is inserted, and FIGS. 5 and 6 are explanatory views showing a conventional waterproof rubber plug inserting method. [Explanation of Symbols] 1 ... Insulated wire, 1a ... Core wire 1b ... Insulation coating, 2 ... Waterproof rubber stopper 2a ... Cylindrical body, 2b ... Circular flange 2c ... Through hole, 3 ... Guide pin 3a Tapered section 4, 4A, 4B Clamper 5 Delivery pipe, 5A Fitting cylinder section 5B Gripping cylinder section

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 43/00 H01R 13/52 H01B 13/00

Claims (1)

(57) [Claims] An insulated wire stripped of a terminal inserted into a delivery pipe and a waterproof rubber plug having a guide pin inserted in a through hole are used, and the covered wire has a strip end protruding from an insertion tube portion of the delivery pipe. From the state, the delivery pipe is slid, the strip terminal is delivered and housed in the insertion pipe part of the pipe, and the guide pin is pushed out by the delivery pipe in which the tip of the insertion pipe part is in contact with the guide pin in the waterproof rubber stopper. After inserting the insertion tube portion accommodating the strip terminal into the through hole of the waterproof rubber plug, the waterproof rubber plug is inserted into the strip terminal of the insulated wire by pulling out the insertion tube portion from the waterproof rubber plug. How to insert a waterproof rubber stopper.